[Bug] Wrong normals in IFC ?

[finetjul]

Bug description

Depending on the camera position, the IFC scene example gets all black

Steps to reproduce

open the IFC example and rotate the camera

Detailed Behavior

Maybe there is a problem with the normals ? the lights ?
Alternatively, should the scene example file be revised and add more "ambient" light ?

Expected Behavior

I would expect a more lit scene

Environment

• vtk.js version: master
• Browsers: Chrome
• OS: Windows

[daker]

Yes, there is still some missing/wrong normals when merge options is set, if you run the example without merging everything is rendered correctly, will try to revisit it again